[cisco-voip] using my DSPs on a 3845

[Ryan Ratliff]

If you configured the 'codec complexity flex' and it doesn't show up  
then it's a default.
The dspfarm command does simply enable the DSPs to be used as a  
dspfarm by the sccp process.

-Ryan

On Jan 25, 2008, at 4:55 PM, Lelio Fulgenzi wrote:

OK. I'll plan to do that sometime.

What does that do? Basically open up the DSPs for individual usage  
and assignment?

Does that then allow me to add the "codec complexity flex" command?  
or is that on by default as I suggested?


----- Original Message -----
From: Ryan Ratliff
To: Lelio Fulgenzi
Cc: Cisco VoIPoE List
Sent: Friday, January 25, 2008 4:42 PM
Subject: Re: [cisco-voip] using my DSPs on a 3845

voice-card 0
  no dspfarm

That needs to be corrected first.  Either the command 'dspfarm' or  
'dsp services dspfarm' needs to be present as the first step.


-Ryan

On Jan 25, 2008, at 4:24 PM, Lelio Fulgenzi wrote:

OK - now I'm worried.....

kc-vgw(config)#dspfarm profile 105 conference
kc-vgw(config-dspfarm-profile)#maximum sessions ?
   <0-0>  Number of sessions assigned to this profile


This doesn't seem to make sense to me.

When I ran/run the DSP calc (see below), it says I that one PVDM64  
should suffice (using the optimized result). When I tried adding the  
CLI suggestion, I'm pretty sure it didn't make any difference in the  
show running, which I was told because it was the default.

Optimal Results
voice-card 0
        codec complexity flex

What I have:

voice-card 0
  no dspfarm
!




DSP Requirements
	
  	Onboard	CLI Information
Optimized Result(Default)	
3 DSP(s).
one PVDM2-48
or
one PVDM2-16 + one PVDM2-32	CLI Info
Normal Result	
6 DSP(s).
one PVDM2-32 + one PVDM2-64
or
two PVDM2-48
or
three PVDM2-32	CLI Info
Worst Case Result	
N/A	
N/A
----- Original Message -----
From: Ryan Ratliff
To: Lelio Fulgenzi
Cc: Cisco VoIPoE List
Sent: Friday, January 25, 2008 3:24 PM
Subject: Re: [cisco-voip] using my DSPs on a 3845

It gets a little murky with the flex DSPs and how many are required  
depend on what voice codecs are being used.

Your best bet is to configure a sccp profile for either conference or  
transcode.  See what the 'max-sessions' command will allow you to  
set.  If you have enough free DSPs then when you do 'max-sess ?' the  
result will include a non-zero number, ie '0-10' or similar instead  
of '0-0'.

Yes you do need to add a CFB in CM with a name that matches whatever  
you set in the 'register' command under the sccp profile on the router.

-Ryan

On Jan 25, 2008, at 3:20 PM, Lelio Fulgenzi wrote:

I've got a 3845 with a PVDM2-64 as far as I can tell. Well, that's  
what I ordered and I trust Cisco! A "show voice dsp" shows the  
following:
DSP   DSP              DSPWARE CURR  BOOT                          
PAK   TX/RX
TYPE  NUM CH CODEC     VERSION STATE STATE   RST AI VOICEPORT TS ABRT  
PACK COUNT
===== === == ========= ======= ===== ======= === == ========= == ====  
============
C5510 001 01 g711ulaw    9.2.2 busy  idle      0  0 0/0/0:23  23     
0  11621/11516
C5510 001 02 g711ulaw    9.2.2 busy  idle      0  0 0/1/0:23  22     
0  63104/64754
C5510 001 03 g711ulaw    9.2.2 busy  idle      0  0 0/0/0:23  07     
0    4906/4634
C5510 001 04 None        9.2.2 idle  idle      0  0                  
0          0/0
<snip>
C5510 004 15 None        9.2.2 idle  idle      0  0                  
0          0/0
C5510 004 16 None        9.2.2 idle  idle      0  0                  
0          0/0
------------------------END OF FLEX VOICE CARD 0  
----------------------------
I gather that each DSP can handle 16 voice calls, so if I have two  
T1s = 23 calls * 2 (each has their own Dchannel)=46 calls / 16 = 2.875.

So that means three DSPs are required to handle my voice calls and I  
have one left for conferencing.

Do I just create a DSP farm with one DSP and somehow assign it as a  
conference resource in Call Manager?

Lelio
------------------------------------------------------------------------ 
--------
Lelio Fulgenzi, B.A.
Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1
(519) 824-4120 x56354 (519) 767-1060 FAX (JNHN)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
"Buffalo buffalo Buffalo buffalo buffalo buffalo Buffalo  
buffalo."      WJR

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